JPS60175234A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain basic quick traverse and quick return modes with a small number of parts by setting a pinch roller means at the 2nd intermediate position between the 1st position which permits the loading of a cassette tape magazine and the 3rd position which is pressed to a capstan shaft. CONSTITUTION:A tape cassette magazine 1 is loaded in the 1st state where a control cam part 3a of a stand-by spring 3 is fitted to a slot 5a of a head substrate 5 after passing through a main substrate 4. In this case, a cassette sensor pin 2 touches the magazine 1 and the engagement is released between the part 3a and the slit 5a. Then the substrate 5 energized by a spring is moved toward and arrow head A to obtain the 2nd state. When a play lever 13 is pressed, a magnetic head 12 is pressed to a magnetic tape with the prescribed pressure by coaction with a pad within the magazine 1. At the same time, a pinch roller 9 is pressed to a capstan shaft by a pinch spring 21 at the 3rd position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic recording/reproducing device suitable for miniaturization.

Conventional configurations and their problems Conventionally, magnetic recording and reproducing devices have been known in which the head board moves at the same time as a cassette tape magazine is installed, allowing operation in each mode. Its structure was complicated. In particular, when a cassette tape magazine is installed, the magnetic head is always in the playback (or recording) mode position, and when converting to fast forward or fast reverse mode, move the magnetic head to a position away from the pad in the cassette tape magazine. Moving the device requires a new configuration, which tends to increase the number of parts and costs.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a magnetic recording and reproducing apparatus that can realize the basic modes of fast forwarding and fast reversing in addition to the reproducing (or recording) mode with a small number of parts.

Structure of the Invention In order to achieve the above object, the magnetic recording and reproducing device of the present invention includes a cassette sensor for detecting the presence or absence of a cassette tape magazine, which is provided on a standby spring member having a control cam portion that engages with a headboard. The apparatus is characterized in that the cassette sensor pin is configured to release the engagement between the control cam section and the head substrate in response to attachment of the cassette tape magazine. According to this configuration, when the cassette tape magazine is mounted, the control cam portion of the standby spring member and the head substrate are released from the holding state, and the third pinch roller means provided on the head substrate is pressed against the capstan shaft. The head substrate can be moved so as to be held at a second position between the position and the first position that allows the mounting of the cassette tape magazine, and from this second position the head having a pinch roller means and a magnetic head can be moved. Since each basic mode of playback (or recording) and fast forward/rewind can be realized by controlling the stroke of the board, it has the advantage of being able to reduce the number of parts needed to realize these basic modes. .

DESCRIPTION OF THE EMBODIMENTS FIGS. 1 to 3 show an embodiment of the magnetic recording and reproducing apparatus of the present invention. In FIGS. 1 to 3, a cassette sensor bin 2 for detecting the presence or absence of a cassette tape magazine is mounted on a standby spring 3 equipped with a control cam portion 3a, and this standby spring 3 is connected to a play stop by a screw 3b. (hereinafter referred to as PS) is fastened to the board 6. Here, between the control cam portion 3a and the elongated hole portion 6 of the base plate 6,
The pinch roller means provided on the head substrate 6 maintains the first state in which the cassette tape magazine is allowed to be mounted. Further, the cassette sensor pin 2 is connected to the main board 4. The head substrate 6, which protrudes through the head substrate 5 and the decorative board 7, is biased in the direction of arrow A in the figure by a spring 20 installed between it and the main substrate 4.

A subboard 16 is connected to the head board 6 and can move forward and backward relative to the cassette tape magazine, and a pinch roller arm 8 is attached to the subboard 16 so as to be rotatable about a shaft 14. is provided. A rotatable pinch roller 9 is provided at the tip of the pinch roller arm 8.

A pinch spring 2 is provided between the pinch roller arm 8 and the sub-head board 16 for applying a biasing force to bring the pinch roller 9 into contact with the capstan shaft 10 with a predetermined pressure.
1 is provided. Further, the sub head substrate 16 is provided with a magnetic head 12. The head shift lever 16 rotatably supported on the main board 4 is moved toward the above side.
It is connected to the main board 16 and is biased in the direction opposite to the arrow A in the figure by a spring (not shown). In addition, in the figure, 11 is a stop lever, 13 is a play lever, and 17
1 is a reference axis, 18 is a taper reel, and 19 is a supply reel.

is in a first position that allows attachment of the cover 1, and is maintained in that state. That is, in this first state, the control cam part 3a provided on the standby spring 3 penetrates the main board 4 and engages with the elongated hole 6a of the head board 6, and the head is activated based on the biasing force of the spring 2o. This prevents the substrate 5 and sub-head substrate 16 from moving in the direction indicated by the arrow.

In this first state, when the tape cassette magazine 1 is installed, the cassette sensor pin 2 and the cassette tape magazine 1 come into contact with each other, as shown in FIG. 6a is released, the spring-biased head substrate 5 moves in the direction indicated by the arrow in the figure, and shifts to the second state. At this time,
Due to the contact between the upper end surface of the control cam section 3a and the head substrate 6, the standby spring 3 is deflected, and the contact between the cassette sensor pin 2 and the cassette tape magazine 1 is released. Therefore, the cassette tape magazine 1 is prevented from floating up by the cassette sensor pin 2 in the second state. And this second
In this state, the head board 6 is moved in the direction indicated by the arrow A by the biasing force of the spring 20, but the sub head board 16 connected to the head board 6 is moved in the direction indicated by the arrow A.
Since the head shift lever 16 is connected to the head shift lever 16 which is biased in the opposite direction, the pinch roller provided on the sub head base plate 16 is The pinch roller 9 at the tip of the arm 8 does not come into contact with the capstan shaft 1o with a predetermined pressure, and the magnetic field 12 provided on the sub-head board 16 is so arranged that the pad pressure inside the cassette tape magazine 1 acts on it. It never comes into contact with the magnetic tape. Therefore, the second state can be automatically achieved by mounting the cassette tape magazine. In this second state, when the play lever 13 is depressed, the head shift lever 16 rotates against the biasing force, and the sub head board 16 is forced in the direction indicated by the arrow. be moved. Therefore, the devil head 12 is brought into contact with the magnetic tape with a predetermined pressure in cooperation with the pad in the cassette tape magazine, and the pinch roller 9 is moved to the third position where it is brought into contact with the capstan shaft with a predetermined pressure by the pinch spring 21. It will be brought to

Next, when removing the cassette magazine 1, first the head board 5 is forcibly moved to the first state,
By removing the cassette tape magazine 1 in this state, the control cam portion 3a of the standby spring 3 and the elongated hole portion 6a of the head substrate 5 are brought into engagement, allowing the return to the first state. .

Effects of the Invention As described above, the present invention includes a pinch roller means for bringing the magnetic tape in the cassette tape magazine into contact with the capstan shaft with a predetermined pressure, so that it can be moved toward the cassette tape magazine side. A head board biased by a spring, a control cam portion that engages with the head board, and a cassette sensor pin that detects the presence or absence of the cassette tape magazine are provided with a seven-digit standby spring, and the force set tape magazine is When the cassette sensor pin is attached to the cassette tape, the control cam part provided on the standby spring and the head board are released from the holding state and the board is moved to the head board, and the pinch roller means moves the cassette tape to the head board. Since the configuration is such that the magazine is located at the second position between the first position that allows mounting and the third position that is pressed against the capstan shaft, playback (or recording), fast forwarding, and winding can be performed from this second position. The head can be easily moved to realize each basic mode of return, and these basic modes can be realized with a small number of parts.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 to 6 show an embodiment of the present invention, in which FIG. 1 is a plan view in a first state, FIG. 2 is a plan view of the main part thereof,
FIG. 3 is a sectional view of the main part, FIG. 4 is a plan view in the second state, FIG. 6 is a sectional view of the main part, and FIG. 6 is a plan view in reproduction mode.

Claims (1)

[Claims] a base plate having two pinch row means for bringing the magnetic tape in the cassette tape magazine into contact with the capstan shaft with a predetermined pressure and biased by a spring so as to be movable toward the cassette tape magazine; and the head. The standby spring member is provided with a control cam portion that engages with the board and a cassette sensor pin that detects the presence or absence of the cassette tape magazine, and when the cassette tape magazine is installed, the standby spring member is activated by the cassette sensor pin. The control cam section provided at the head board is disengaged from the head board to move the head board forward, and the pinch roller means loads the tape cassette tape magazine.
A magnetic recording/reproducing device characterized in that the magnetic recording/reproducing device is configured to be located at a second position intermediate between a first position where detachment is allowed and a third position where the pinch roller means is pressed against the capstan shaft.